New York City-based Hospital for Special Surgery hip and knee surgeon Bradford Waddell, MD, has been named chair of the Young Arthroplasty Group Committee in the American Association of Hip and Knee Surgeons.

Colorado Springs-based Colorado Center of Orthopaedic Excellence welcomed Jason Weisstein, MD, who previously served as director of the Center for Joint Preservation and Replacement at the Paley Orthopedic & Spine Institute in West Palm Beach, Fla.